function [isIn] = checkHowIsIn (t)
[~, len] = size (t); 
isIn = ones (1,len);
for i = 1:len
    flag = 0;
    for j = 1:len
        if (i == j)
            continue;
        end
        if (t(i,j) ~= 9)
            flag = 1;
            break;
        end
    end
    if (flag == 0)
        isIn(i) = 0;
    end
end
